UVC, the kind that kills pathogens harms the skin and eyes and creates ozone. The article talks about using “Upper Room UV” which is just lights posted a safe distance away from humans above them which makes it considerably less effective at killing pathogens at the human level and also now theres a whole area of space where you cant go without risking harm from UVC like being on a ladder or some other platform.

UV also degrades lots of materials a lot faster

Edit: I meant Upper Room UV bot Far UV

You know, his mom had multiple holes you could use instead.

O3

Yeah UV light alone is safe, but by the end of the article it mentioned that far-UV light also triggers a chemical reaction that creates ozone, which is dangerous. It needs a good ventilator system to make it safer.